Auxiliary battery



FIG. 1 is a first perspective view of an auxiliary battery;

FIG. 2 is a second perspective view thereof;

FIG. 3 is a side elevation view thereof;

FIG. 4 is a second side elevation view thereof;

FIG. 5 is a third side elevation view thereof;

FIG. 6 is a fourth side elevation view thereof;

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof.

CLAIM The ornamental design for an auxiliary battery, as shown anddescribed.